 As a result, some CUCVs were replaced in the 1980s and 1990s by the HMMWVs they were to augment.The U.S. military continued to keep CUCVs in active service long after their projected lifespan.CUCVs of all generations are still in U.S. service, though many M880/M890s and CUCVs have passed through military surplus sales into civilian ownership.